i now have a treo 700p. it's new and has MAJOR bluetooth issues....to the point that i gave up using headsets and was just waiting for the firmware to be updated. the headset would not stay paired.

when i got my TCH, at first, i didn't even try to pair the treo. but after a few days i gave it a shot and it has been flawless. it does connect and disconnect automatically when i start/turn off the car.

and what is really stange is that the treo phone does not support voice activated calling. when you wear a headset, you have to initiate the call with your phone. BUT, on the TCH, all of the voice dailing features are fully supported.